What can I do if I am falsely accused of stealing a Rolex watch? Police are now involved.

I work in a salon where I see clients in an enclosed room. After working with 5 people during the course of the day I discovered a women's watch underneath the therapy table. It was time to go home so after cleaning up I gathered my belongings along with the watch and headed for the exit. I brought the watch up to the front desk and asked the reception girl where she wanted me to put it. Here I have to preface: I have had my suspicions about this girl and others find her odd as well. She told me to leave it on the desk which I did. We 2 were the only people present. I left for the day. Next week my client who left the watch called and was told that no one knew anything about a watch. When spoken to the girl claimed she never saw me put the watch down: a boldface lie. Now what? - Is this your question? Add additional information